Hydraulic shock absorber optimizes against the risks of tailgating

摘要

The present invention relates to a hydraulic shock absorber (1) of the vehicle which comprises: - a reservoir (301); - a piston (373) slidably mounted in the reservoir; - a shaft (371) extending axially on a first side of the piston; - a distributor (307) including: - a primary orifice (324) opening into the tank of a second side of the piston, in communication with a first flow circuit; and - a secondary orifice (325) opening into the reservoir of the second side of the piston and in communication with a second flow circuit, the head loss through the second circuit being greater than the pressure drop across the first flow circuit; - a protuberance (380) sliding in a cavity (372) to the inside of the shaft (371), projecting from the second side of the piston, separated from the orifice of a first part of the stroke and closing the orifice of a second part of the travel.